Regions of chromatin can be condensed to restrict access to DNA through this chemical modification of histone proteins:
a. promotion.
b. methylation.
c. sublimation.
d. dehydration.
e. strangulation.
b
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Would babies need to be immunized against lockjaw (tetanus) if their mother had been immunized against the disease? Why or why not?
A. No-because the mother's IgG antibodies would be passed along through the placenta before birth, protecting the baby from the infection. B. Yes-because even though maternal IgG antibodies might be passed along through the placenta, they will not last forever. The baby will need to create its own antibody response to be protected against future tetanus. C. No-because maternal IgG antibodies would be passed along in the breast milk, protecting the baby from infection. D.
Helicobacter pylori has been associated with ____
a. irritable bowel syndrome b. duodenal ulcers c. peptic ulcers d. HPV e. GERD
An educated guess or a testable statement used to answer a question about observations is referred to as a(n) ________
Fill in the blank(s) with correct word
In a single sodium-potassium pump cycle, ATP is used with the result that
A. 3 sodium ions enter and 2 potassium ions leave. B. 2 sodium ion enters and 1 potassium ion leaves. C. 3 sodium ions leave and 2 potassium ions enter. D. sodium and potassium ions enter and water leaves. E. 2 sodium ion leaves and 1 potassium ion enters.